Is M91.9 a billable ICD-10-CM code?

No. M91.9 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does M91.9 sit in the tabular list?

Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Chondropathies (M91-M94).

What cannot be coded together with M91.9?

M91.9 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above M91.9 (M91) and apply to it just the same.

M91.9

M91.9 — Juvenile osteochondrosis of hip and pelvis, unspecified

Non-billable headerICD-10-CMunspecified

M91.9 is a non-billable header ICD-10-CM code for juvenile osteochondrosis of hip and pelvis, unspecified. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 inherited from the categories above M91.9

These are not written on M91.9, but they bind it: a note on a category applies to every code beneath it. Billing M91.9 with anything listed here is a denial.

Written on M91 — Juvenile osteochondrosis of hip and pelvis

slipped upper femoral epiphysis (nontraumatic) (M93.0-)

Risk adjustment

M91.9 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code history

M91.9 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Code to one of these instead M91.9

3 child codes. Green means billable.

Related codes at this level

Codes that share M91. If M91.9 is not quite right, the correct code is usually one of these.

Questions about M91.9

Is M91.9 a billable ICD-10-CM code?: No. M91.9 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does M91.9 sit in the tabular list?: Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Chondropathies (M91-M94).
What cannot be coded together with M91.9?: M91.9 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above M91.9 (M91) and apply to it just the same.